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Noise around 150Hz on digi mode with my #qmx


 

Hi,

I build my QMX 1 week ago. The process run well and I'm able to use it.

However, I got some weird noise around 150Hz on WSJTX, as you can see in my screenshot. I trying both magnetic loop antenna and dummy load. It don't know were to search to find the reason on the noise. I tried a 9V battery and a USB-C PD set on 9V as power source but I still have the noise. I try with both ACG/VOX enabled/disabled.

I ran the sweep hardware test using the terminal access and all curve sounds good, according to the operator manual. I also verify my band settings on the menu and all correctly setup too.

Do you have any clue what can be the cause of that RX noise?

Thanks,
VA2HSW/F4HSW

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